Machine for trimming the rands of boots and shoes.



L. S. SWEENEY.

MACHINE FOR TRIMIVHNG THE RANDS 0F BOOTS AND SHOES.

APPLICATION FILED DEC. 21, 1914.

Patented Apr.13, 1915.

I I l I a H {7/11 THE NORRIS PETERS C0,. PHOTO-LITHO- WASHING'UN. D. C.

LOUIS S. SWEENEY, 013 ABINGTON, MASSACHUSETTS.

MACHINE FOB TRIMMING BANDS OF BOUTS AND E'vHOES.

Application filed. December 21., 1914.

To all whom it may concern Be it known that 1, Louis S. SWEENEY, a citizen of the United States, residing at Abington, in the county of Plymouth and State of Massachusetts, have invented an Improvement in Machines for Trimming the Bands of Boots and Shoes, of which the following is a specification.

This invention relates to a machine for operating upon boots and shoes designed especially to trim a rand around the heelseat of the shoe. Tn machines usually employed to do this work, two cutters associated with a shield or guard are arranged upon a spindle, one cutter being designed to trim the face of the rand, and the other to trim or smooth off the top of the rand. The cutter usually employed for trimming or smoothing off the top of the rand, consists of a flat plate or disk having radially extending blades, which blades are beveled from the inner to the outer side of the plate, thereby giving to the end of each blade a thin blunt edge, and each blade has a cutting edge formed on one side of it by beveling the blade from the outer to the inner side, and in view of the fact that the end of the blade is very thin, said bevel is formed with a taper, the apex of which is at the end of the blade. The shield which has been employed consists of a disk having its edge-portion beveled from the outer to the inner side, thereby admitting of the beveled edge thus formed to enter the crease between the upper and the rand, and a very short lip is formed continuously around said thin edge which extends overthe ends of the cutting-blades, at least for a short distance, and serves also to thicken the edge of the shield at its engaging point, and the inner face of said disk is made flat to receive upon it the flat side orface of the aforesaid cutter. Notwithstanding great care is exercised in making these cutters, the thin ends of the blades of different cutters vary in thickness, and sometimes the ends of individual blades vary in thickness from side to side, and occasionally the short lip on the shield extends too far over the ends of the blades of such cutters and not far enough over the ends of the blades of other cutters, and as a result the work performed by said cutter will be poorly done or not done at all. Only when the lip and the ends of the blades are correctly proportioned relatively to each other can the best work be done. Furthermore, by the Specification of Letters IFateut.

Patented Apr. 13, 1915.

Serial No. 878,221.

employment of a continuously formed lip around the margin of the shield, particularly when the thickness of the ends of the blades is not correctly proportioned with respect to said lip, and the spindle bearing them is rotated at a high rate of speed, a gummy substance is collected by and deposited on the end-portions of the blades which is objectionable, said gummy substance being collected more particularly when the shoe is in temper, and it will be understood that the shoe usually is in temper.

I have discovered that the outer end-portions of the cutting-edges of the blades should terminate or occupy a position just in rear of the lip to obtain the best results, and to accomplish this result, I have devised a novel form of shield having a plurality of lips'arranged around the edge of the shield, usually corresponding in number with the number of blades on the cutter, and have made said lips to extend inward gradually increasing distances from end to end or throughout their entire length, beginning, at nil, and increasing gradually to distances equal to the thickness of the end-portions of the thickest blades. As the cutter and shield are assembled on a spindle, they are free to be adjusted rotarily until the means employed for securing them thereto, in fixed relative positions, is set, and, while thus free, the shield and cutter are rotarily adjusted relatively to each other until the outer ends of the cutting-edges of the blades are disposed just in rear of the inner edges of the lips, regardless of the thickness of the end-portions of the blade.

Figure 1, is a side elevation of a trimming-device embodying this invention. Fig. 2, is a vertical section of the trimming-device, shown in Fig. 1. Fig. 3, is a bottom plan view of the trimming-device. Fig. l, is a bottom plan view of the disk cutter and shield. Fig. 5, is a fragmentary detail in perspective of a portion of the shield and cutter. Figs. 6, 7 and 8, are fragmentary sectional details of proportions of the shield and cutter. Fig. 9, is a view illustrating the operation of the trimmingdevice on a shoe. Fig. 10, is a fragmentary detail of a portion of the cutter.

The spindle 10, collar 12 arranged thereon, and cutter 15 having blades with cutting-edges arranged at the ends thereof for trimming the-face of the rand, and the cut ter having radially extended blades with cutting-edges formed on the sides of its blades, are all of any usualfsuitable con-. struction, the novelty herein involved being embodied in the shield 25. Referring to saidcutter '20, it Will be observed that it consists of a disk having a beveled edge,

the bevel 21, being extended from the inner to the outer side thereof, see Fig. 2, so that its outer side or face isflat, and the ends 22 of the blades are curved concentric to the axis, and are very thin, and it isthese thin ends of the blades which vary in thickness, notwithstanding care in the man.u-'

facture of the cutter. The cutting-edges 23 of said blades are formed by beveling one of the side edgesof the blades throughout its length from the outer to the inner side, so that said "cutting-edge is inclined. On account of the'end's 22 of; different blades varying, in thickness, the outer end of the "cutting-edge terminatesat diiferent points WlthTTGSPGCt to' a lip which is formed on the edge of the shield 25. Saidshield, as here shown, consists of a disk adapted to be arranged on the spindle next the cutter 20, and has. its outer side beveled at the edge,

. as at 26, and its inner side or face made fiat, except that it has at its edge a P111. ralityof lips 2'7, preferably corresponding in number with the number. of blades on the cutter 20, and said lips are made to ex Copies of this patent may be obtained for of the thickest end-portion of any blade which is ordinarily encountered. \Vhen the parts are assembled on the spindle, the shield and adjacent cutter will be adjusted rotarily with respect to each other, so that the outer end of the cutting-edge 23 terminates just in rear of the inner edge of the lip, so that the cutting-edge is exposed and suitable for action throughout its entire length, thus admitting of doing its Work correctly from the outer edge or face of the rand to the bottom of the crease. The adjustment should be done with care, but when, the parts are correctly adjusted and fixed in relative positions, they Will operate to their best advantage and the best quality of Work will be done.

I claim: o

A trimming-device for boots and shoes, comprising a cutter adapted to be arranged on a rotatable spindle having radially extended blades with cutting edges formed on one side of each blade, and a shield adapted to be arrangedv on said spindle having a plurality of lips projecting from that surface adjacent the blades and in a direction to cover the ends of the blades, said cutter and shield being rotarily adjustable with respect to each other to bring the cutting edge of each blade opposite that part of a lip having the desired height.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

. LOUIS S. SWEENEY. Witnesses B. J. NoYEs, H. B. DAVIS.

five cents each, by addressing the Commissioner of Patents,

Washington, 1 ).0. 

